Page 3
Samsung- authorized service provider. Any damage or defect to product resulting from a repair, or an attempt to repair, the product by any person other than a Samsung certified service provider will not be covered by the warranty.
Page 4
Samsung’s liability in any case shall be limited to the greatest extent permitted by law. Samsung reserves the right, at its sole discretion, to change, modify, add or remove portions of any part of this manual at any time. It is your responsibility to check the manual periodically for changes. Your use of the manual...
Precautions 1. Precautions 1-1. Safety Precautions • Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1-1. Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC power jack before servicing.
Precautions 6. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that no wires or components touch thermally hot parts.
Following the repair by a non-authorised service provider, self-repair or non-professional repair of the product, Samsung is not liable for any damage to the product, any injury or any other product safety issue caused by any attempt to repair the product which does not carefully follow these repair and maintenance instructions.
Precautions 1-3. Electrostatically Sensitive Devices (ESD) Precautions Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly called Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some field-effect transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
Precautions 1-4. Installation Precautions 1. For safety reasons, more than a people are required for carrying the product. 2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock. 3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.
This section of the service manual describes the disassembly and reassembly procedures for the LED TV. 1. Disconnect the LED TV from the power source before disassembly. 2. Follow these directions carefully. − Use the Samsung Service tool to disassemble the cabinet. • Recommend to use the Samsung Service tool CAUTION −...
Page 11
Disassembly and Reassemble Description Picture Description Insert the Open Jig completely into the tab of the Jig Direction rear cover’s left side bottom corner and following directions 1→2→3. Assembly Misc P-jig-2017 BN81-14946A Locking Part • 43 inches − Top : 8 point −...
Page 12
Disassembly and Reassemble Description Picture Description • 55 inches Snap Hooks − Snap Hooks : 2 point − Top : 10 point − Left/Right : 4 point − Bottom : 10 point − Cover Raer : 3 point Cover Rear Bottom •...
Page 13
Disassembly and Reassemble Description Picture Description • 75 inches − Top : 12 point − Left/Right : 7 point − Bottom : 12 point − COVER REAR : 5 point Cover Rear Bottom • 85 inches − Top : 14 point −...
Page 14
Disassembly and Reassemble Description Picture Description Gently lift up the rear cover from the middle to prevent inside clips damaged. NOTE • Straighten ALL Locking Wires before reattaching cover. Remove the ASSY COVER P-REAR.
Page 15
Disassembly and Reassemble Description Picture Description Remove the Speaker and BT/WIFI/IR Function. SPEAKER( BT/WIFI/IR Function( BT/WIFI/IR/FUNCTION (1) 1. Remove the cable from ASSY PCB MAIN. LEAD CONNECTOR-SUB ASSY 2. Remove from panel. <Cable removal> BT/WIFI/IR Function ASSY SPEAKER P-FRONT (2) 1.
Page 16
Disassembly and Reassemble Description Picture Description Remove LEAD CONNECTOR-POWER Cables and [1CNT] FFC Cables. • LEAD CONNECTOR-POWER (SMPS - MAIN) LEAD CONNECTOR-POWER Cables • FFC Cables (1 EA) FFC Cables • LEAD CONNECTOR-POWER (SMPS - MAIN) [2CNT] • FFC Cables (2 EA) LEAD CONNECTOR-POWER Cables FFC Cables...
Page 17
Disassembly and Reassemble Description Picture Description Remove the ASSY PCB MAIN. • Gently lift up (Top Right corner) to release the lock. • Use both hands to hold the board and slide to the left to release the board. Lift Here to Release lock NOTE •...
Page 18
Disassembly and Reassemble Description Picture Description Before Removing SMPS board, Discharge Capacitors • 43 inches You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below. If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads Measurement point with Volt Meter.
Page 19
Disassembly and Reassemble Description Picture Description Discharge Capacitors • 50 inches You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured Measurement point below. If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.
Page 20
Disassembly and Reassemble Description Picture Description Discharge Capacitors • 55 inches Measurement point You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below. If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.
Page 21
Disassembly and Reassemble Description Picture Description Discharge Capacitors Measurement point • 65 inches You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below. If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.
Page 22
Disassembly and Reassemble Description Picture Description Discharge Capacitors • 75 inches You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below. Measurement point If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.
Page 23
Disassembly and Reassemble Description Picture Description Discharge Capacitors • 85 inches You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below. Measurement point If LED ON -> LED OFF, Discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.
Page 24
Disassembly and Reassemble Description Picture Description Remove the SMPS. 1. Push and hold down BLU connector tab to release it’s panel lock connection. <LEAD CONNECTOR-BLU > 2. Lift to release the lock tab on upper left side of Board. (Step 4 will assist) 3.
Page 25
Disassembly and Reassemble Description Picture Description 4. Use Open Jig in notch to help release & smoothly slide SMPS to the Right. (While pushing BLU Tab & Releasing Lock Tab) 5. Gently lift the 1 edge to unlock the SMPS board.
Troubleshooting 3. Troubleshooting 3-1. After Replacing Main Board ■ Setting TV into Factory Mode Samsung IR Remote (Limited Operation) 1. TV Power Standby. 2. Press as follows. • Remote Button NTSC MUTE POWER BN59-01301A (Recommended) First Screen Appearing in Factory Mode Important Screen info: T-NKLAKUC-XXXX.XX...
Page 27
Troubleshooting MAIN : Option, MODE : SATELLITE, RES : NOSIGNAL Home Updates Exit Type 55K6AU0SB Local Set SW MODEL UCU8000 Front Color UCU8000 - U55CB2 SAMPLE Writing Fornt Color ■ Replacing Main Board When replacing Main Board, certain values needs to be manually input in Factory menu to complete the replacement. Steps to Replace Main Board (Example) 1.
Page 28
Troubleshooting ② Local Set : Set according to Local region(country) ③ SW Model : Check Label Rating of the TV(located on the Rear Cover) - SW Model is digits after “/” in Version No. Choose same SW Model code from the list. Home Updates Exit...
Page 29
Troubleshooting ④ Front Color :Check Label Rating of the TV Home Updates Exit Factory Reset Type 55K6AU0SB Writing Type Local Set SW Model UCU8000 Front Color UCU8000 - U55CB2 Writing Fornt Color Model Code UN55CU8000FXZA TUNER Ch Table NONE * Reference to Front Color list in the Factory Menu <"Front Color"...
Page 30
Troubleshooting ⑤ Model code :Check Label Rating of the TV Home Updates Exit Factory Reset SAMPLE Type 55K6AU0SB Writing Type Local Set SW Model UCU8000 Front Color UCU8000 - U55CB2 Writing Front Color Model Code UN55CU8000FXZA <Model Code digits exceeded > <Set Model Code>...
Page 31
Troubleshooting ■ SVC - S/N - Writing S/N <Writing S/N : Check Label Rating of the TV > SAMPLE...
Need help?
Do you have a question about the UN TU800 Series and is the answer not in the manual?
Questions and answers